In most cases, the bearing cage will not be damaged under reasonable working conditions, but the wrong operation in daily production will reduce the service life of the bearing cage. Let's take a look at the reasons for the fracture of the bearing cage.
1. Poor lubrication of bearings
The bearing is running in a state of lean oil, which is easy to form adhesive wear, which deteriorates the working surface condition. The tearing objects generated by the adhesive wear are easy to enter the cage, causing abnormal load on the cage, which may cause the cage to break.
2. Bearing creep phenomenon
Creep is the sliding phenomenon of multi-finger ferrules. When the interference of the mating surface is insufficient, the load point moves to the surrounding direction due to sliding, resulting in the phenomenon that the ferrule is deviated in the circumferential direction relative to the shaft or housing.
3. Abnormal load of bearing cage
Improper installation, inclination, and excessive interference can easily lead to reduced clearance, increased friction and heat generation, softening of the surface, and premature abnormal peeling. The operation is blocked and additional load is generated, which aggravates the wear of the cage, and such a deteriorated cyclic action may cause the cage to break.
4. Defects of bearing cage material
Cracks, large foreign metal inclusions, shrinkage holes, air bubbles and riveting defects, missing nails, pad nails or gaps in the joint surface of the two half cages, and serious riveting injuries may cause the cage to break.
5. Intrusion of hard foreign bodies in bearings
The intrusion of foreign hard foreign objects or other impurities aggravates the wear of the cage.
6. The cage is damaged
The main causes of damage are: cage vibration, excessive speed, wear and foreign body blockage.
7. Cage wear
Wear of imported bearing cages can be caused by insufficient lubrication or abrasive particles.
8. The raceway is blocked by foreign bodies
Fragments of sheet material or other hard particles may become trapped between the wedge cage and the rolling elements, preventing the latter from orbiting around its own axis.
9. Bearing vibration
When the inlet bearing contacts vibrate, the inertial force can be so great that it causes fatigue cracks to form in the cage material sooner or later these cracks cause the cage to fracture.
10. The bearing rotates too fast
If the inlet bearing is operating at speeds exceeding the retainer design, the inertia experienced in the retainer may cause the retainer to break due to gravity. Usually, where very high speeds are relevant, the retainer can be selected with specially designed bearings.
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